6 papers
Spin polarons in the t-J model in an unconstrained representation
A. V. Dotsenko
The report discusses the slave-fermion representations of the t-J model and describes another representation, in which fermions and bosons are completely commuting and in which the…
Temperature dependence of the electron chemical potential in YBa2Cu3O
A. V. Dotsenko, O. P. Sushkov
We study the behaviour of the electronic chemical potential in YBa2Cu3O near the superconducting transition using the spin-wave exchange theory of pairing. We find that the experim…
Effective action approach to a bi-layer frustrated antiferromagnet
A. Dotsenko
A bi-layer quantum frustrated antiferromagnet is studied using an effective action approach. The action derived from the microscopical Hamiltonian has the form of the O(3) non-line…
Quantum Phase Transition in the Frustrated Heisenberg Antiferromagnet
A. Dotsenko, O. Sushkov
Using the J_1-J_2 model, we present a description of quantum phase transition from Neel ordered to the spin-liquid state based on the modified spin wave theory. The general express…
Hole-hole superconducting pairing in the t-J model induced by spin-wave exchange
V. I. Belinicher, A. L. Chernyshev, A. V. Dotsenko +1
We study numerically the hole pairing induced by spin-wave exchange. The contact hole-hole interaction is taken into account as well. It is assumed that antiferromagnetic order is…
Hole-Hole Contact Interaction in the t-J Model
A. L. Chernyshev, A. V. Dotsenko, O. P. Sushkov
Using an analytical variational approach we calculate the hole-hole contact interaction on the Néel background. Solution of the Bethe-Salpeter equation with this interaction gives…